[Cleaning]
• Blow a jet of compressed air at a pressure not higher than 685 kPa {7 kgf/cm2} against the inside surfaces of the element.
• Move the compressed air jet up and down along all pleats of the filter paper element.
[Inspection]
• Shine some electric light inside the element.
• Replace the element if thin spots or broken parts are evident in the filter paper, or if the packing at the top of the element is damaged.
Also replace the element if the dust on the element is damp with oily smoke or soot, regardless of the replacement schedule.
[Installation]
• Install the covers while aligning their respective marks with each other as shown in the illustration.
